The default PHP Melody favicon is stored in the /templates/[current theme]/img/ folder (e.g. http://demo.phpmelody.com/templates/default/img/favicon.ico).
If you don’t have a favicon file for your site yet, you can create one from your logo by visiting our favorite online favicon generator.
Once you’re satisfied with the results, save your freshly generated favicon.ico file to your computer. Then, upload it to your PHP Melody installation, replacing the existing file from your /templates/[current theme]/img/ folder.
Job well done.
Note: Starting with PHP Melody v2.3 the favicon.ico file was moved to the /templates/[current theme]/img/ folder. Older PHP Melody versions store favicon.ico in the /uploads/ folder.